Malicious PDF — malware analysis report

Static analysis result for SHA-256 545b9b154d24b9b8…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 04:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8ce527d87187efba945e89ddea5cee45 SHA-1: 99b73d39bf0706078b51f8be9b221c9636ad8781 SHA-256: 545b9b154d24b9b8ff4da369e361aae24d7b57a4547e522ad31c1cc65c100a9c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-free-spins-and-coins-link-haktuts-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53FC 24528 bytes
SHA-256: f13f8dc7de49b9afb95b61acb523e24de1aa3bc82bfcc9e8c2d6c8bf9546f41c
font_01_sfnt_off00008b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B99 18372 bytes
SHA-256: d0160522c9507928c114f36e82183f3878c9bb5f52b4c502e96d0270f56f9c5a

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